Included among them are Evolution Studios, the team behind MotorStorm. The decisions were made after an "internal review"- the teams remain "vital assets".
"It has been decided that production on a small number of projects within London Studio, Studio Liverpool, and Evolution Studios will be streamlined or closed due to a portfolio review and project prioritisation," said Sony in a statement.
"This decision was made following an internal review of all games and it was deemed that with the incredibly strong list of exclusive first party titles coming up both this year and in the near future, resource should be reallocated to enhance those projects closer to completion."
"The affected first party studios have been and will continue to be vital assets within the WWS family, and have a history of producing genre defining games such as MotorStorm, WipEout, SingStar and EyePet. This decision will have no impact on the role that our first party studios will play in the future of all PlayStation platforms."
MotorStorm: Apocalypse releases on PS3 in UK March 16th, in US April 12.